Make sure they know your interested in customer service and hygiene, also very important that you are fast at this job. It has a be effect. Be yourself and show them how much you want the job.
Everyone knows each other really well and is willing to help you out with anything. We can all relate to each others experiences which I found really beneficial!
Yes, during a shift less than 5 hours it is 50%, within a shift that already provides you a free lunch, it is the standard discount of 20%.